Fire-extinguisher.



W. GRIMSHAW.

FIRE EXTINGUISHER.

APPLICATION HLED APR. Is. 1918.

Patented Mar. 18,1919.

WILLIAM GBIMSHAW, 0F GLENELLYN, ILLINOIS.

FIRE-EXTINGUISHER.

Specification of Letters Patent.

Application filed April 15, 1918. Serial No. 228,608.

To all whom it may concern:

Be it known that I, WILLIAM a citizen of the United States, and a resident of Glenellyn, in the county of Dupage and State of Illinois, have invented a new and useful Fire-Extinguisher, of which the following is a specification.

This invention relates to fire extinguishers and relates particularly to fusible members for automatic sprinklers and similar puroses.

The object of the present invention is to provide a fusible member for the purpose specified, which shall be simple in construction, strong, durable and effective for its designed purpose. To effect this object, a fusible member of my invention comprises the various features and details of construction hereinafter described and claimed.

In the accompanying drawing, in whic my invention is fully illustrated,

Figures 1 and 2 are, respectively, front and rear face views, on an enlarged scale, of opposite sides of a fusible member embodying my invention.

Fig. 3 is a side or edgewise view thereof.

Fig. 4: is a longitudinal sectional view thereof on the line 41- 1 of Fig. 1; and

Fig. 5 is a transverse sectional view thereof on the line 5-5 of Fig. 41.

Referring now to the drawings, my improved fusible member, designated as a whole a, consists of two plates 1 and 2 soldered together, said plates being preferably stamped from sheet phosphor-bronze or other suitable sheet metal, and being of proper width and thickness to afiord requisite strength. When operating in tension, said plates 1 and 2 are preferably stamped from metal of about 17 gage.

As shown, said plates 1 and 2 are counterparts of each other, being of the same size and shape, thus requiring but one set each of blanking and swaging dies for forming the same, and are symmetrical on both sides of a longitudinal center line.

As shown, also, said fusible member is adapted to be applied through the medium of toggle arms indicated in dotted lines at 3 and 4, Fig. 4:, the relation being such that said fusible member GRri sHAw,

will act in tension. To provide for engaglng the toggle arms 8 an a with said fusible member a and to permit said toggles to separate when said member fuses, each of the plates 1 and 2 is provided with a hole 5 in one end thereof and a slot or notch 6 in its opposite end, and are soldered together with the slot 6 in one thereof in register with the hole 5 in the other, thus providing for pulling said plates apart endwise, as contemplated.

To strengthen the connection between the plates 1 and 2 and thus correspondingly relieving necting said plates,

said plates are provided with interlocking shoulders 7 and 8 formed on the overlapping connected ends of said male shoulders 7 being formed at the ends of portions of said plates struck u from the connected sides or faces thereof, shown at 9, and the female shoulders 8 being formed at the ends of recesses struck back from the connected sides or faces of said plates, as shown at are two sets of said opposite shoulders 7 and 8, the male and female shoulders of each of said sets of shoulders being formed, respectively, on different plates and the shoulders of each set facing in opposite directions.

Said shoulders 7 and 8 will be inclined relatively to the planes of the connecte sides of the plates 1 and 2, the angle of inclination being such that tension applied to said plates will produce a desire component of force tending to effect disengagement of said shoulders and to force said plates apart. For general uses, a desirable angle plates, the

of inclination of said shoulders to the planes of the connected faces of said plates is about sixty degrees.

In the preferable construction shown, also, the sides of the portions of said plates between the shoulders 7 and 8 thereon, respectively, are disposed in planes which are inclined to the planes of the sides of the plates of which they are parts, the angles of inclination depending upon the distance between the different sets of shoulders and the distance which they project from the faces of said plates, both of which dimensions may vary within considerable limits, thus producing a corresponding variation in the inclinations of said plates between the shoulders thereon and the sides or faces thereof. Obviously, by facing the interlocking shoulders on the plates 1 and 2 in opposite directions to those shown in the drawings, said fusible member can be readily adapted 1. A fusible member comprising plates 10. As shown, there v Patented Mar. 18, 1919.

the stresson the solder joint consoldered together in overlapped position, of the connected sides of said plates at, angles said plates comprising portions in their slightly less than right angles, Whereby overlapping ends Which are inclined at a When said fusible member is subjected to small angle to the plane of the connected end'Wis'e stress in opposition to said'shoul- 5 sides thereof, the ends of said inclined porders, said shoulders will product oompoc tions forming projections on opposite sides nents of force tending to effect disengage of said plates, each of Which is provided ment of said shoulders and separation 'of'the With a recess on the reverse side of said plate, plates forming said fusible member, sub said projections on and recesses in the con stantially as described.

10 nected sides of said plates forming interlock- 3. A fusible member, comprising. plates ing shoulders, saidshoulders being inclined soldered, together in overlapped, position, to the plane of the connected sides of said said plates comprising portions in -their plates at angles slightly less than right overlapping ends which are inclined to the angles, the relation being such that When plane of the connected sides thereof at angles 1 said fusiblemember is subjected to endWise of substantially 30 degrees, the ends of said stress in opposition to said shoulders, said inclined portions'forming projections onopshoulders will produce components offorce positesides of said plateseach of- Which is :tending to effect disengagement .of said provided With a recess onthe reverse side in shoulders andseparation of the plates formof said l ate,-the projections on and recesses described. ing interlocking shoulders Which, are in- 2. A fusible member comprising plates clined to the plane of the connected sides soldered together in overlapped position, of said plates'at angles of, substantially'60 a 25 overlapping ends inclined atsmall angles berissubjected to endWise stress'in opposito the plane of the'connected sides thereof, tion to said shoulders, the inclination of said opposite ends of which are symmetrical at shoulders Will produce components of force opposite sides of said plane of connection tending to effect disengagement of said ing said fusible member, substantially as in the connected sides of said plates form- 7 said plates comprising portions in their degrees, whereby When said fusible memand of the transverse centers of said inclined shoulders and separation of the plates form- 30 portions, the ends of said inclined portions ing said fusible member, substantially as de forming projections on opposite sides of scribed. 7 b said plates, each of Which is provided With V In testimony, that I claim the foregoing a recess on the reverse side of said plate, the as my invention, I affix my'signature this 5th projections on and recesses in the connected day of'April, A. D. 1918 7 sides of said plates forming interlocking shoulders Which are inclined to the plane WILLIAM GRIMSHAWV.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, I a Washington, 13.0. 

